A motorist was recorded driving 196km/h in a 100km/h zone by gardaí ahead of the bank holiday weekend.
This was on the N55 at Kilcogy in Co Cavan.
So far, gardaí have recorded 211 drivers for speeding since 7am on Thursday morning.
Other speeds include 87km/h in a 50km/h zone in Murntown, Co. Wexford, and 106km/h in a 60km/h zone on the Monaghan Road, Castleblayney, Co. Monaghan.
A driver was also recorded driving 141km/h in a 80km/h zone on the N81 at Tullow, Co. Carlow.
Commenting on these detections, Chief Superintendent in the Garda National Roads Policing Bureau, Jane Humphries said, "Our August Bank Holiday roads policing operation has been underway since first thing yesterday morning and while we are generally seeing good levels of compliance with speed limits on roads around Ireland, I am gravely concerned by the risks taken by some drivers.
"Anyone that is prepared to drive at dangerously excessive speeds like those we’ve already detected, has the potential to destroy lives – if not their own, others too.
"We are out conducting checkpoints and using our technology to detect those speeding nationwide. Speeding is one of the foremost dangerous driving behaviours, along with using your phone while driving and being distracted.
"Please slow down and drive safely today and over the rest of the long weekend ahead as so many of us take to the roads.”
